Fix performance regression on Tracer: recognize _doublePow in Math.

runtime/vm/intermediate_language.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/intermediate_language.h"
 
 #include "vm/bigint_operations.h"
 #include "vm/bit_vector.h"
 #include "vm/dart_entry.h"
 #include "vm/flow_graph_allocator.h"
@@ skipping 2510 matching lines @@
       return Array::length_offset();
     default:
       UNREACHABLE();
       return -1;
   }
 }
 
 
 InvokeMathCFunctionInstr::InvokeMathCFunctionInstr(
     ZoneGrowableArray<Value*>* inputs,
-    InstanceCallInstr* instance_call,
+    intptr_t original_deopt_id,
     MethodRecognizer::Kind recognized_kind)
     : inputs_(inputs),
       locs_(NULL),
       recognized_kind_(recognized_kind) {
   ASSERT(inputs_->length() == ArgumentCountFor(recognized_kind_));
   for (intptr_t i = 0; i < inputs_->length(); ++i) {
     ASSERT((*inputs)[i] != NULL);
     (*inputs)[i]->set_instruction(this);
     (*inputs)[i]->set_use_index(i);
   }
-  deopt_id_ = instance_call->deopt_id();
+  deopt_id_ = original_deopt_id;
 }
 
 
 intptr_t InvokeMathCFunctionInstr::ArgumentCountFor(
     MethodRecognizer::Kind kind) {
   switch (kind) {
     case MethodRecognizer::kDoubleTruncate:
     case MethodRecognizer::kDoubleFloor:
     case MethodRecognizer::kDoubleCeil: {
       ASSERT(!CPUFeatures::double_truncate_round_supported());
       return 1;
     }
     case MethodRecognizer::kDoubleRound:
       return 1;
     case MethodRecognizer::kDoubleMod:
-    case MethodRecognizer::kDoublePow:
+    case MethodRecognizer::kMathDoublePow:
       return 2;
     default:
       UNREACHABLE();
   }
   return 0;
 }
 
 // Use expected function signatures to help MSVC compiler resolve overloading.
 typedef double (*UnaryMathCFunction) (double x);
 typedef double (*BinaryMathCFunction) (double x, double y);
@@ skipping 26 matching lines @@
 const RuntimeEntry& InvokeMathCFunctionInstr::TargetFunction() const {
   switch (recognized_kind_) {
     case MethodRecognizer::kDoubleTruncate:
       return kTruncRuntimeEntry;
     case MethodRecognizer::kDoubleRound:
       return kRoundRuntimeEntry;
     case MethodRecognizer::kDoubleFloor:
       return kFloorRuntimeEntry;
     case MethodRecognizer::kDoubleCeil:
       return kCeilRuntimeEntry;
-    case MethodRecognizer::kDoublePow:
+    case MethodRecognizer::kMathDoublePow:
       return kPowRuntimeEntry;
     case MethodRecognizer::kDoubleMod:
       return kModRuntimeEntry;
     default:
       UNREACHABLE();
   }
   return kPowRuntimeEntry;
 }
 
 
 #undef __
 
 }  // namespace dart